What is involved in hemopoiesis? a. Hemocytoblasts are the starting cells for the formation of all the formed elements except platelets. b. Colony-stimulating factors are made by macrophages. c. Red blood cells are the only formed elements produced in the red bone marrow. d. Leukopoietin from the kidneys stimulates white blood cell production. e. Lymphocytes are produced from megakaryocytes.

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